Grinding pan



Jul 12, 1932.

G. KRIDER GRINDING PAN 2 Sheds-Sheet 1 Filed Feb. 14, 1950 July 12,1932. KRlDER 1,867,081

GRINDING PAN Filed Feb. 14, 1930 2 Sheets-Sheet 2 Inventor A itorneyPatented July 12, 1932 UNITED STATES PATENT OF C GEORGE E. KRIDER, 0FDUNCANSVILLE, PENNSYLVANIA, AssIGNoR 'ro MCLANAHAN i & STONECORPORATION, OE HOLLIDAYSIBURG, PENNSYLVANIA, A ORPORATION OEPENNSYLVANIA GRINDING PAN Application filed February 14,1930. Serial No.428,422.

This invention relates to certain refinements and improvements in theconstruction of grinding machines frequently referred to in the trade asa grinding pan. v

It is submitted that with the conventional type of machine,particularly, the so-called dry pan, the main thrust bearing for thepropulsion shaft is placed at the bottom in a socket forming base and isrequired to take practically all of the wear and weight and this isexcessive as a general rule.

It has been regarded as impractical to place two thrust bearings in themachine for the reason that they cannot be fitted accurately, causingthe wear to fall upon either one or the other of these thrust bearings.

With'the foregoing objections in mind, I have evolved and producedcertain refinements and improvements in the bearing structures designedwith a view toward equalizing and distributing the stress and strain ina uniform manner and to permit self-alining of the pan carrying shaft.

The foregoing are accomplished through the medium of a structuralorganization of novel details such as will be hereinafter made evident.

- In the drawings:

Figure 1 is a view in section and elevation showing a conventionalgrinding pan or machine with the improved supplemental bearingincorporated therein at the upper end portion of the shaft.

Figure 2 is a horizontal section on the line 2-2 of Figure 1.

Figure 3 is an enlarged sectional view showing the details of thesupplemental bearing structure. 7

In the drawings in Figure 1, the reference character 4 designates theconventional frame carrying the pinion shaft 5 having the usual gear 6at one end, and the bevelled pInion 7 at the other end, said pinionbelng 1n mesh with the bevelled gear 8 carried by the upper end of thevertical or perpendlcular shaft 9. The panis represented at 10 and thenumeral 11 designates generally the base. This includes a bearingreceptacle or socket 12, having the end thrust bearing assembly 13incorporated therein in the usual way.

This is the self-aliningtype of thrust bearing. The numeral 14merely'designates the thrust cap. i

That portion of the shaft which extends through the aperture at thecenter of the frame cooperates with a self-alining roller bearing raceor assembly generally repre} sented by the numeral 15. My improvement ispredicated uponthe provision of a hanger bearing which cooperates withthe thrust bear'mgin thebase in relieving it andsupp'le mentlng It initsaction to better distribute and equalize strain and stress which isdeveloped in theimachines 1 In accordance with my idea, I,provide acollar 16 which is fastened on the threads 17 of the shaft. This collarcooperatesvwith aballbearing raceassembly indicated at 18',

and the latter cooperates with a self-alining thrust bearing including abeveled ring 19 cooperating with the bevelled surface'of a com-f panionseat ring 20. The last named ring presses down upon springs 21 restingon the bed plate. This'bed plate isin the nature of an annulus 22secured by bolts or the like 23 to the crosshe'ad in the framestructure. A central opening is formed in the flange portion 24 toaccommodate thatportion of the shaft 19which passes therethrough'. y

The numeral 25' merely designates. a per; pendicular axis of the shaft9. Under this arrangement, Ijrelieve the bottom thrust bearing assembly13 of excessive weight by providing the top thrust bearing suspendedfrom thespring supporting bed plate and CO7 operating with the collar 16carried by the shaft. In a sense, this top thrust hearing, which issupplemental in'chara cter in comparison to the lower thrust bearing 13,comprises'the bedplate' 22constituting a support for the spring, andsaid spring serving to support thering-like-portion 19 and 20V to permitfreedom of play.

The collar 17 bearing on the ball bearing race 18- brings the upperweight on the parts 19 and 20 which-in turn'carry the weight to the fullcompressive action of the coiled spring 24-. Thus the upper thrustbearing is a floatin bearing and-is intimately related to the sel-alining roller bearing structure 15. '7 Both of these assembliesgreatly aid in relieving the lower thrust bearing 13 of undue andexcessive Weight and strain.

It is apparent that the companion relationship of the majorithrustbearing 13 and the supplemental yielding thrust bearing on the frame is,not necessarily restricted to use in a dry pan machine. The fact is, theinventive idea may be incorporated any machine involving the;utilization of longitudinally spaced bearings and :acooperating-rotaryshaft.

tion after. considering the description in con,

I nect'ion w'ith thedrawings. 'Therefore, a;

more lengthy description is regarded asunnecessary. v t

Minor changes 1n shape, size,v and rearrangement of details comingwithin the field 1 actual practice if desired.

of invention claimed may be resorted to in claim: V r a v 11 111 astructure of the class described,v a frame includin a horizontal crosspiece having an intermediate portion apertured, a re:

, bearing'raceinterposed between the upper tary shaft extending throughand beyond said aperture, and a thrust bearing carried by the f-rame andcooperable with the adjacent intermediate portion'of'the shaft, saidthrust bearing, including a removablebed, plate, a V

plurality of circumferentially spacedcoil springs supported thereon,upper and lower contacting beveled rings :mOunted' on the springs-,acollar'onisaid shaft, and a ball I ring and said collar.

2. Ina structureof the-characterdescribed, a frame including ahorizontal crossmember having aniopeningltherein, an annulus de-vt'achab'ly mounted on-the lower 'side 'of the cross membercoaxiallyjvvith the opening, a fiange on-the'in'ner periphery of theannulus disposed beneath the opening, a rotatable shaft'extendingthrough the annulus and the opening, a" series of coilspringsmounted on the flanges around the shaft, a substantially planoeconcavering mounted'on the springs and; encircling the shaft in spaced relationthereto, asubstantially plano-convex ring op- V v eratively mounted onthe lano-concave ring, 1

7 testimony whereof I'afiixmy signature; 1 i

abearing race mounted onthe planmconvex r ng and a colla rmountedfon theshaft and engaged wlthithe'bearingrace in a manner to support theshaftther'eoni' "GEORGE: KRI-DER.. 7

It is thought that persons skilled iii the" art to which the inventionrelates vvill be able 7 to obtain a clear understanding of the inven-

